Cheaper drill bits tend to use lower-quality materials and are prone to damage. One of the most common reasons for drill bit breaking is poor drill bit strength and quality. On the other hand, high torque will cause the drill to break in the center of the flute. A drill usually breaks at the end of the flute due to radial force. What causes a drill bit to breakĭrilling into hard surfaces may cause the drill bit to break and, in some cases, become stuck. The tungsten carbide drill can drill 1,500 to 10,000 holes in aluminum, aluminum alloys, copper alloys, stainless steel, alloy steel, carbon steel, cast irons, and structural steel.īut, of course, the harder the material, the fewer drill holes you can make.A cobalt drill bit can drill as much as 1,000 to 2,000 holes on stainless steel, alloy steel, aluminum alloys, carbon steel, cast iron, structural steel, brass, and bronze.High-speed steel (HSS) can drill from 150 to 450 holes in stainless steel, aluminum, structural steel, and low carbon steel.You should expect to drill between 150 and 250 holes in concrete with each drill bit.It is also affected by the thickness and type of material drilled. How long the drill bits last can also depend on the material being drilled. But, on the other hand, the tungsten carbide drill bit will last longer than the cobalt drill bit. For example, a cobalt drill bit will last longer than regular high-speed steel (HSS). It will depend on various factors such as sharpness, drill speed, and the type of drill bit used. So how long do drill bit last? Drill bits can wear out much faster than you think. ![]() ![]() Friction and extreme heat can wear down the bit's critical cutting edges, making drilling jobs more difficult and time-consuming. Drill bits can become dull over time due to extreme heat from drilling holes on rigid surfaces and due to improper use.
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